Renesas R5F21264JFP#U0

Overview

R5F21264JFP#U0 from Renesas Electronics is a 16-bit R8C/26 Group single-chip microcontroller with 16 KB flash ROM, 1 KB RAM, 12-channel 10-bit A/D converter, UART0/UART1 serial interfaces, and Timer RA/RB/RC/RE - operating at -40°C to +85°C in 32-pin LQFP for embedded control in industrial appliances and automotive subsystems.

For engineers reviewing the R5F21264JFP#U0 datasheet, R5F21264JFP#U0 pinout, R5F21264JFP#U0 application, or R5F21264JFP#U0 equivalent, this page delivers verified specifications, validated pin functions, confirmed J-version temperature rating (-40°C to +85°C), and real-world use cases in motor control, sensor interface, and LIN-compliant vehicle modules - all grounded in Renesas' official REJ03B0168-0210 documentation.

Technical Context

The R5F21264JFP#U0 implements the R8C CPU core with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz XIN clock, VCC = 3.0–5.5 V). It integrates three independent clock generation circuits: XIN-based crystal oscillator, high-speed/low-speed on-chip oscillators (with frequency adjustment), and XCIN/XCOUT support (N/D versions only).

Peripheral integration includes hardware LIN via Timer RA and UART0, I²C bus interface, clock-synchronous serial I/O with chip select, and real-time clock functionality in Timer RE (compare match only for J version). All peripherals are memory-mapped and controlled via dedicated SFRs aligned to the 1 Mbyte address space.

Key Specifications

Pinout & Package

Package: 32-pin molded-plastic LQFP (PLQP0032GB-A), 7 mm × 7 mm, 0.8 mm pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F21264SDFP, the R5F21264JFP#U0 shares identical electrical behavior and pin compatibility but reflects Renesas' later J-version qualification traceability; versus R5F21274JFP, it omits data flash to reduce cost and complexity in fixed-parameter designs.

Availability

R5F21264JFP#U0 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and consumer appliance control requiring stable component supply across extended product lifecycles.

Supply support for R5F21264JFP#U0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.

The R8C/26 Group, including R5F21264JFP#U0, was designed for cost-sensitive, reliability-critical embedded control in automotive sub-systems and industrial equipment - emphasizing integrated peripherals, low-power operation, and AEC-Q100-aligned robustness.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for R5F21264JFP#U0?

The R5F21264JFP#U0 achieves a minimum instruction execution time of 50 ns at 20 MHz XIN clock frequency, requiring VCC = 3.0 V to 5.5 V. This specification is explicitly confirmed for J-version devices in Table 1.1 of Renesas document REJ03B0168-0210. Operation above 20 MHz is not supported, and voltage outside this range may cause functional failure or reduced reliability.

Does R5F21264JFP#U0 include hardware LIN capability, and how is it implemented?

Yes, R5F21264JFP#U0 integrates a hardware LIN module per Renesas documentation, realized through combined use of Timer RA and UART0. This implementation supports LIN 2.0/2.1 physical layer timing requirements without external transceivers. The feature is active in all R8C/26 Group variants including the J version, and is confirmed in Section 1.2 "Peripheral Functions" of REJ03B0168-0210.

What are the A/D converter specifications of R5F21264JFP#U0, and does it support external reference voltage?

The R5F21264JFP#U0 features a 10-bit successive-approximation A/D converter with 12 input channels (AN0–AN11). It supports external reference voltage via the VREF pin, allowing precise scaling independent of VCC. Internal reference is not provided; design must supply stable reference voltage (e.g., 2.5 V) to VREF for calibrated measurements, as documented in Table 1.1 and Pin Function Table 1.5.

Is XCIN/XCOUT functionality available on R5F21264JFP#U0 for low-frequency clock generation?

No, XCIN/XCOUT functionality is restricted to N and D versions per Renesas documentation (Notes 2 and 3 in Tables 1.1/1.2 and Figure 1.4). The J version - including R5F21264JFP#U0 - does not support the 32 kHz crystal oscillator circuit. Real-time clock operation relies solely on Timer RE's internal capabilities or external clock injection via other pins, as clarified in Section 1.2 and Pin Function Table 1.5.

What is the guaranteed data retention and endurance for the flash memory in R5F21264JFP#U0?

R5F21264JFP#U0 specifies 1,000 program/erase cycles for its 16 KB flash ROM, with data retention guaranteed for 20 years at Ta = 85°C (per Renesas REJ03B0168-0210, Section 1.2 "Flash Memory"). This applies to both factory-programmed and user-programmed regions. No data flash is present - unlike R8C/27 Group parts - so all nonvolatile storage resides in the main program memory array.